scholarly journals Crystallographic Orientation Determination of Hexagonal Structure Crystals by Laser Ultrasonic Technique

2016 ◽  
Vol 684 ◽  
pp. 012001 ◽  
Author(s):  
W Li ◽  
J Coulson ◽  
P Marrow ◽  
R J Smith ◽  
S J Lainé ◽  
...  
Keyword(s):  
Crystallographic Orientation ◽  
Hexagonal Structure ◽  
Ultrasonic Technique ◽  
Laser Ultrasonic ◽  
Orientation Determination

scholarly journals Basic Concepts and Recent Advances of Crystallographic Orientation Determination of Graphene by Raman Spectroscopy

Crystals ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 375 ◽  
Author(s):  
Yucheng Lan ◽  
Mobolaji Zondode ◽  
Hua Deng ◽  
Jia-An Yan ◽  
Marieme Ndaw ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Crystallographic Orientation ◽  
Graphene Nanosheets ◽  
Two Dimensional ◽  
Two Dimensional Materials ◽  
Unique Material ◽  
Determination Methods ◽  
Orientation Determination ◽  
Crystallographic Orientations

Graphene is a kind of typical two-dimensional material consisting of pure carbon element. The unique material shows many interesting properties which are dependent on crystallographic orientations. Therefore, it is critical to determine their crystallographic orientations when their orientation-dependent properties are investigated. Raman spectroscopy has been developed recently to determine crystallographic orientations of two-dimensional materials and has become one of the most powerful tools to characterize graphene nondestructively. This paper summarizes basic aspects of Raman spectroscopy in crystallographic orientation of graphene nanosheets, determination principles, the determination methods, and the latest achievements in the related studies.

scholarly journals Orientation Determination by Continuous Etching Patterns in Copper and Copper Alloys

1995 ◽  
Vol 24 (4) ◽  
pp. 199-219 ◽  
Author(s):  
W. H. Wang ◽  
X. Sun ◽  
G. D. Köhlhoff ◽  
K. Lücke
Keyword(s):  
Crystallographic Orientation ◽  
Copper Alloys ◽  
New Method ◽  
Etch Pits ◽  
Etch Patterns ◽  
Grain Orientations ◽  
Etched Surface ◽  
Other Orientation ◽  
Orientation Determination

A new method for determination of grain orientations using etch patterns was developed for copper and copper alloys. This method is based on the fact, that one gets etch patterns characteristic for the crystallographic orientation of the etched surface, if a specimen of copper or copper alloys is etched in conc. HNO3. In contrast to etch pits, the etch patterns are developed continuously over the whole grain. This allows a direct and continuous observation of the orientation changes within and between the grains, which is not possible for many other orientation determination methods. The determination accuracy of the new method depends on the crystallographic orientation of the etched surface and varies between 2° and 10°. For some special surface orientations the etch patterns allow even the determination of very small orientation changes (≤ 2°), occurring e.g. in a deformed grain.

The study of ultrasonic longitudinal velocities for nanostructured NiAl alloys by laser ultrasonic technique

1998 ◽  
Vol 105 (9) ◽  
pp. 601-604 ◽  
Author(s):  
Yinglei Du ◽  
Baimei Wu ◽  
Xiaorong Zhang ◽  
Xiaoyin Qin
Keyword(s):  
Ultrasonic Technique ◽  
Laser Ultrasonic
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